1. Food and Feed Safety Research Unit, U.S. Department of Agriculture, Agricultural Research Service, College Station, Texas.
2. The Evergreen State College, Olympia, Washington.
3. National Cattlemen's Beef Association, Centennial, Colorado.
4. Cactus Feeders, Amarillo, Texas.
5. Meat Animal Research Center, U.S. Department of Agriculture, Agricultural Research Service, Clay Center, Nebraska.
6. Dale Bumpers Small Farms Research Center, U.S. Department of Agriculture, Agricultural Research Service, Booneville, Arkansas.